Sermorelin
Sermorelin is a synthetic 29-amino acid peptide corresponding to the biologically active N-terminal fragment of endogenous GHRH, representing the minimal sequence required for full agonist activity at pituitary somatotroph GHRH receptors. It has been FDA-approved for diagnosing and treating pediatric growth hormone deficiency, and is used off-label in adult wellness medicine to improve GH pulsatility, sleep quality, body composition, and recovery. A key distinction from exogenous hGH is that sermorelin preserves the hypothalamic-pituitary feedback axis, so GH release remains subject to normal physiological regulation and is less likely to suppress endogenous GH production. Adult wellness evidence comes primarily from small observational studies rather than placebo-controlled RCTs, and long-term safety data in healthy adults without GH deficiency are limited.
Evidence last reviewed: 19 Apr 2026
Not a routine supplement — not recommended for self-directed use.
Information here is educational only, not a recommendation to use. See our Safety page.
Evidence is from research or clinical settings — does not imply safety outside supervised contexts.
The evidence for sermorelin primarily comes from moderate-quality RCTs focusing on specific populations, such as older adults and those with GH deficiency. However, the lack of large-scale placebo-controlled trials in healthy adults limits its generalizability and long-term safety data.
GH secretionAdults with GH deficiency · RCTModerate
Sermorelin significantly increased GH secretion in adults with GH deficiency.
Sleep qualityOlder adults · RCTModerate
Improvement in sleep quality was observed in older adults using sermorelin.
Lean mass preservationElderly individuals · RCTModerate
Sermorelin helped preserve lean mass in elderly individuals.